How is this movie called? Please help!?

I've watched it few years back and it's not even that old. A group of students went on a trip with a bus which stopped working in the middle of nowhere. But they found a mechanic who had a service near the bus and, how I can remember, told them that he can fix the bus for a few days and that they can stay. But after all that, bad things started to happen. Some people would attack them with chainsaws, fire throwers etc. and kill them and they recorded everything. At the end of the movie, students set the whole place on fire and police saved them. There were two girls in that group who were actually involved. Please help!